Observational effects from quantum cosmology

TL;DR

This paper evaluates the observational implications of quantum cosmology models, highlighting how loop quantum cosmology can produce detectable effects in the cosmic microwave background, unlike traditional Wheeler-DeWitt approaches.

Contribution

It compares different quantum cosmology models and discusses their potential to produce observable signatures in the early universe.

Findings

Loop quantum cosmology can generate detectable deviations in the cosmic spectrum.

Current observations constrain the parameter space of quantum cosmology models.

Future experiments could falsify certain quantum cosmology predictions.

Abstract

The status of quantum cosmologies as testable models of the early universe is assessed in the context of inflation. While traditional Wheeler-DeWitt quantization is unable to produce sizable effects in the cosmic microwave background, the more recent loop quantum cosmology can generate potentially detectable departures from the standard cosmic spectrum. Thus, present observations constrain the parameter space of the model, which could be made falsifiable by near-future experiments.